add issue 1843 cache card issue
add issue 1843 cache card issue

cryogenian/slamdata,zeeiyerWork/slamdata,mossprescott/slamdata,shujuwen2013/slamdata,shujuwen2013/slamdata,natefaubion/slamdata,beckyconning/slamdata,beckyconning/slamdata,natefaubion/slamdata,natefaubion/slamdata,mossprescott/slamdata,zeeiyerWork/slamdata,cryogenian/slamdata